path: root/TAO/TAO_IDL/be/be_visitor_valuetype/valuetype_ch.cpp

//
// $Id$
//

// ============================================================================
//
// = LIBRARY
//    TAO IDL
//
// = FILENAME
//    valuetype_ch.cpp
//
// = DESCRIPTION
//    Visitor generating code for Valuetypes in the client header
//    (see C++ mapping OMG 20.17)
//
// = AUTHOR
//    Torsten Kuepper  <kuepper2@lfa.uni-wuppertal.de>,
//    based on interface_ch.cpp from Aniruddha Gokhale
//
// ============================================================================

ACE_RCSID (be_visitor_valuetype, 
           valuetype_ch, 
           "$Id$")

// ******************************************************
// Valuetype visitor for client header
// ******************************************************

be_visitor_valuetype_ch::be_visitor_valuetype_ch (be_visitor_context *ctx)
  : be_visitor_valuetype (ctx)
{
}

be_visitor_valuetype_ch::~be_visitor_valuetype_ch (void)
{
}

int
be_visitor_valuetype_ch::visit_valuetype (be_valuetype *node)
{
  TAO_OutStream *os = this->ctx_->stream ();

  if (!node->cli_hdr_gen () && !node->imported ())
    {
      *os << be_nl << "// TAO_IDL - Generated from "
          << __FILE__ << ":" << __LINE__ << be_nl << be_nl;

      *os << "// Valuetype class" << be_nl;

      // == STEP 1: Generate the class name and class names we inherit ==

      // Forward declaration.
      *os << "class " << node->local_name () << ";" << be_nl;

      os->gen_ifdef_macro (node->flat_name (), "_ptr");

      *os << "typedef " << node->local_name ()
          << " *" << node->local_name () << "_ptr;" << be_nl;

      os->gen_endif ();

      // Generate the ifdefined macro for the _var type.
      os->gen_ifdef_macro (node->flat_name (), "_var");

      // Generate the _var declaration.
      if (node->gen_var_defn () == -1)
        {
          ACE_ERROR_RETURN ((LM_ERROR,
                             "(%N:%l) be_visitor_valuetype_ch::"
                             "visit_valuetype - "
                             "codegen for _var failed\n"),
                            -1);
        }

      os->gen_endif ();

        // Generate the ifdef macro for the _out class.
      os->gen_ifdef_macro (node->flat_name (), 
                           "_out");

      // Generate the _out declaration.
      if (node->gen_out_defn () == -1)
        {
          ACE_ERROR_RETURN ((LM_ERROR,
                             "(%N:%l) be_visitor_valuetype_ch::"
                             "visit_valuetype - "
                             "codegen for _out failed\n"), 
                            -1);
        }

      // Generate the endif macro.
      os->gen_endif ();
    }

  if (node->imported ())
    {
      return 0;
    }

  // Now the valuetype definition itself.
  os->gen_ifdef_macro (node->flat_name ());

  // Now generate the class definition.
  *os << "class " << be_global->stub_export_macro ()
      << " " << node->local_name ();

  // Node valuetype inherits from other valuetypes (OMG 20.17.9)
  // (ordinary (not abstract) interfaces ignored).

  *os << be_idt_nl <<": ";

  int i;  // loop index
  be_valuetype *inherited = 0;

  if (node->n_inherits () > 0)
    {
      for (i = 0; i < node->n_inherits (); ++i)
        {
          inherited =
            be_valuetype::narrow_from_decl (node->inherits ()[i]);

          if (i > 0)
            {
              *os << ",";

              if (i == 1)
                {
                  *os << be_idt_nl;
                }
              else
                {
                  *os << be_nl;
                }
            }

          be_decl *scope = 0;

          if (inherited->is_nested ())
            {
              // Inherited node is used in the scope of "node" node.
              scope =
                be_scope::narrow_from_scope (node->defined_in ())->decl ();
            }

          // Dump the scoped name.
          *os << "public virtual ";
          *os << inherited->nested_type_name (scope);
        }  // end of for loop

      if (i > 0)
        {
          if (i > 1)
            {
              *os << be_uidt;
            }

          *os << be_uidt_nl;
        }
    }
  else
    {
      *os << "public virtual CORBA_ValueBase" << be_uidt_nl;
    }

  // Generate the body.
  *os << "{" << be_nl
      << "public:" << be_idt_nl

  // Generate the _ptr_type and _var_type typedef
  // but we must protect against certain versions of g++
      << "\n#if !defined(__GNUC__) || !defined (ACE_HAS_GNUG_PRE_2_8)"
      << be_nl
      << "typedef " << node->local_name () << "* _ptr_type;" << be_nl
      << "typedef " << node->local_name () << "_var _var_type;\n"
      << "#endif /* ! __GNUC__ || g++ >= 2.8 */" << be_nl << be_nl

  // Generate the static _downcast operation.
  // (see OMG 20.17.{4,5}).
      << "static " << node->local_name () << "* "
      << "_downcast (CORBA::ValueBase* );" << be_nl
      << "// The address of static _downcast is implicit used as type id\n"
      << be_nl
      << "// (TAO extensions or internals)" << be_nl
      << "static CORBA::Boolean _tao_unmarshal (" << be_idt << be_idt_nl
      << "TAO_InputCDR &," << be_nl
      << node->local_name () << " *&" << be_uidt_nl
      << ");" << be_uidt_nl
      << "virtual const char* "
      << "_tao_obv_repository_id () const;"
      << be_nl
      << "static const char* "
      << "_tao_obv_static_repository_id ();" << be_nl << be_nl;

  // Ugly TAO any support routine
  *os << "static void _tao_any_destructor (void *);"
      << be_nl << be_nl;


  // Generate code for the valuetype definition.
  if (this->visit_valuetype_scope (node) == -1)
    {
      ACE_ERROR_RETURN ((LM_ERROR,
                         "(%N:%l) be_visitor_valuetype_ch::"
                         "visit_valuetype - "
                         "codegen for scope failed\n"),
                        -1);
    }

  // Protected member:

  // Generate the "protected" constructor so that users cannot
  // instantiate us.
  *os << be_uidt_nl << "protected:" << be_idt_nl
      << node->local_name ()
      << " ();" << be_nl
      << "virtual ~" << node->local_name () << " ();\n" << be_nl;

  *os << "// TAO internals" << be_nl
      << "virtual void *_tao_obv_narrow (ptr_arith_t);" << be_nl;

  // Support for marshalling.
  if (!node->is_abstract ())
    {
      *os << "virtual CORBA::Boolean "
          << "_tao_marshal_v (TAO_OutputCDR &);" << be_nl;
      *os << "virtual CORBA::Boolean "
          << "_tao_unmarshal_v (TAO_InputCDR &);" << be_nl;
  // %! optimize _downcast away: extra parameter with type info
  // set (void *) in CDR Stream with the right derived pointer.
    }


  // Private member:

  // Private copy constructor and assignment operator. These are not
  // allowed, hence they are private.
  *os << be_uidt_nl << "private:" << be_idt_nl;
  *os << node->local_name () << " (const " << node->local_name () << " &);"
      << be_nl
      << "void operator= (const " << node->local_name () << " &);"
      << be_nl;

  // Map fields to private data (if optimizing).
  if (node->opt_accessor ())
    {
      *os << be_uidt_nl << "protected:" << be_idt_nl;
      *os << "CORBA::Boolean "
          << "_tao_marshal_state (TAO_OutputCDR &);" << be_nl
          << "CORBA::Boolean "
          << "_tao_unmarshal_state (TAO_InputCDR &);"
          << be_uidt_nl << be_nl;
      *os << "private:" << be_idt_nl;

      this->gen_pd (node);
    }
  else // Need a way to access the state of derived OBV_ classes.
    {
      if (!node->is_abstract ())
        {
          *os << be_uidt_nl << "protected:" << be_idt_nl;
          *os << "virtual CORBA::Boolean _tao_marshal__"
              <<    node->flat_name () << " (TAO_OutputCDR &) = 0;"
              << be_nl;
          *os << "virtual CORBA::Boolean _tao_unmarshal__"
              <<    node->flat_name () << " (TAO_InputCDR &) = 0;"
              << be_nl;
        }
    }

  *os << be_uidt_nl << "};" << be_nl;

  os->gen_endif ();


  // Generate the _init -related declarations.
  be_visitor_context ctx (*this->ctx_);
  ctx.state (TAO_CodeGen::TAO_VALUETYPE_INIT_CH);
  be_visitor_valuetype_init_ch visitor (&ctx);

  if (visitor.visit_valuetype (node) == -1)
    {
      ACE_ERROR_RETURN ((LM_ERROR,
                         "(%N:%l) be_visitor_valuetype_ch::"
                         "visit_valuetype - "
                         "failed to generate _init construct.\n"),  
                        -1);
    }

  // Step last: generate typecode declaration.
  if (be_global->tc_support ())
    {
      be_visitor_context ctx (*this->ctx_);
      ctx.state (TAO_CodeGen::TAO_TYPECODE_DECL);
      be_visitor_typecode_decl visitor (&ctx);

      if (node->accept (&visitor) == -1)
        {
          ACE_ERROR_RETURN ((LM_ERROR,
                             "(%N:%l) be_visitor_valuetype_ch::"
                             "visit_structure - "
                             "TypeCode declaration failed\n"),
                            -1);
        }
    }

  node->cli_hdr_gen (I_TRUE);

  return 0;
}


int
be_visitor_valuetype_ch::visit_operation (be_operation *node)
{
  TAO_OutStream *os = this->ctx_->stream ();

  this->ctx_->node (node); // save the node

  // Every operation is declared virtual in the client code.
  *os << "virtual ";

  // STEP I: Generate the return type.
  be_type *bt = be_type::narrow_from_decl (node->return_type ());

  if (!bt)
    {
      ACE_ERROR_RETURN ((LM_ERROR,
                         "(%N:%l) be_visitor_valuetype_ch::"
                         "visit_operation - "
                         "Bad return type\n"),
                        -1);
    }

  // Grab the right visitor to generate the return type.
  be_visitor_context ctx (*this->ctx_);
  ctx.state (TAO_CodeGen::TAO_OPERATION_RETTYPE_CH);
  be_visitor_operation_rettype or_visitor (&ctx);

  if (bt->accept (&or_visitor) == -1)
    {
      ACE_ERROR_RETURN ((LM_ERROR,
                         "(%N:%l) be_visitor_valuetype_ch::"
                         "visit_operation - "
                         "codegen for return type failed\n"),
                        -1);
    }

  // STEP 2: Generate the operation name.
  *os << " " << node->local_name ();

  // STEP 3: Generate the argument list with the appropriate mapping. For these
  // we grab a visitor that generates the parameter listing.
  ctx = *this->ctx_;
  ctx.state (TAO_CodeGen::TAO_OBV_OPERATION_ARGLIST_CH);
  be_visitor_obv_operation_arglist ooa_visitor (&ctx);

  if (node->accept (&ooa_visitor) == -1)
    {
      ACE_ERROR_RETURN ((LM_ERROR,
                         "(%N:%l) be_visitor_operation_ch::"
                         "visit_operation - "
                         "codegen for argument list failed\n"),
                        -1);
    }

  return 0;
}

int
be_visitor_valuetype_ch::visit_field (be_field *node)
{
  be_valuetype *vt = be_valuetype::narrow_from_scope (node->defined_in ());

  if (!vt)
    {
      return -1;
    }

  be_visitor_context* ctx = new be_visitor_context (*this->ctx_);
  ctx->state (TAO_CodeGen::TAO_FIELD_OBV_CH);
  be_visitor_valuetype_field_ch visitor (ctx);

  if (vt->opt_accessor ())
    {
      visitor.setenclosings ("",";");
    }
  else
    {
      visitor.setenclosings ("virtual "," = 0;");
    }

  if (node->accept (&visitor) == -1)
    {
      ACE_ERROR_RETURN ((LM_ERROR,
                         "(%N:%l) be_visitor_valuetype_obv_ch::"
                         "visit_field - codegen failed\n"),
                        -1);
    }

  return 0;
}


void
be_visitor_valuetype_ch::begin_public (void)
{
  TAO_OutStream *os = this->ctx_->stream ();

  *os << "public:" << be_idt_nl;
}

void
be_visitor_valuetype_ch::begin_private (void)
{
  TAO_OutStream *os = this->ctx_->stream ();

  *os << be_uidt_nl << "protected:" << be_idt_nl;
}